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Markdown 的设计哲学

Markdown 的目標是實現「易讀易寫」。
不過最需要強調的便是它的可讀性。一份使用 Markdown 格式撰寫的文件應該可以直接以純文字發佈，並且看起來不會像是由許多標籤或是格式指令所構成。
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                        Markdown 语法和 MWeb 写作使用说明
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                <p>[TOC]</p>
<h2 id="markdown-的设计哲学"><a class="header-anchor" href="#markdown-的设计哲学"></a>Markdown 的设计哲学</h2>
<blockquote>
<p>Markdown 的目標是實現「易讀易寫」。<br>
不過最需要強調的便是它的可讀性。一份使用 Markdown 格式撰寫的文件應該可以直接以純文字發佈，並且看起來不會像是由許多標籤或是格式指令所構成。<br>
Markdown 的語法有個主要的目的：用來作為一種網路內容的<em>寫作</em>用語言。</p>
</blockquote>
<a id="more"></a>
<h2 id="本文约定"><a class="header-anchor" href="#本文约定"></a>本文约定</h2>
<p>如果有写 <code>效果如下：</code>， 在 MWeb 编辑状态下只有用 <code>CMD + 4</code> 或 <code>CMD + R</code> 预览才可以看效果。</p>
<h2 id="标题"><a class="header-anchor" href="#标题"></a>标题</h2>
<p>Markdown 语法：</p>
<pre><code># 第一级标题 `&lt;h1&gt;` 
## 第二级标题 `&lt;h2&gt;` 
###### 第六级标题 `&lt;h6&gt;` 
</code></pre>
<p>效果如下：</p>
<h1 id="第一级标题-h1"><a class="header-anchor" href="#第一级标题-h1"></a>第一级标题 <code>&lt;h1&gt;</code></h1>
<h2 id="第二级标题-h2"><a class="header-anchor" href="#第二级标题-h2"></a>第二级标题 <code>&lt;h2&gt;</code></h2>
<h6 id="第六级标题-h6"><a class="header-anchor" href="#第六级标题-h6"></a>第六级标题 <code>&lt;h6&gt;</code></h6>
<h2 id="强调"><a class="header-anchor" href="#强调"></a>强调</h2>
<p>Markdown 语法：</p>
<pre><code>*这些文字会生成`&lt;em&gt;`*
_这些文字会生成`&lt;u&gt;`_

**这些文字会生成`&lt;strong&gt;`**
__这些文字会生成`&lt;strong&gt;`__
</code></pre>
<p>在 MWeb 中的快捷键为： <code>CMD + U</code>、<code>CMD + I</code>、<code>CMD + B</code><br>
效果如下：</p>
<p><em>这些文字会生成<code>&lt;em&gt;</code></em><br>
<em>这些文字会生成<code>&lt;u&gt;</code></em></p>
<p><strong>这些文字会生成<code>&lt;strong&gt;</code></strong><br>
<strong>这些文字会生成<code>&lt;strong&gt;</code></strong></p>
<h2 id="换行"><a class="header-anchor" href="#换行"></a>换行</h2>
<p>四个及以上空格加回车。<br>
如果不想打这么多空格，只要回车就为换行，请勾选：<code>Preferences</code> - <code>Themes</code> - <code>Translate newlines to &lt;br&gt; tags</code></p>
<h2 id="列表"><a class="header-anchor" href="#列表"></a>列表</h2>
<h3 id="无序列表"><a class="header-anchor" href="#无序列表"></a>无序列表</h3>
<p>Markdown 语法：</p>
<pre><code>* 项目一 无序列表 `* + 空格键`
* 项目二
* 项目二的子项目一 无序列表 `TAB + * + 空格键`
* 项目二的子项目二
</code></pre>
<p>在 MWeb 中的快捷键为： <code>Option + U</code><br>
效果如下：</p>
<ul>
<li>项目一 无序列表 <code>* + 空格键</code></li>
<li>项目二</li>
<li>项目二的子项目一 无序列表 <code>TAB + * + 空格键</code></li>
<li>项目二的子项目二</li>
</ul>
<h3 id="有序列表"><a class="header-anchor" href="#有序列表"></a>有序列表</h3>
<p>Markdown 语法：</p>
<pre><code>1. 项目一 有序列表 `数字 + . + 空格键`
2. 项目二 
3. 项目三
1. 项目三的子项目一 有序列表 `TAB + 数字 + . + 空格键`
2. 项目三的子项目二
</code></pre>
<p>效果如下：</p>
<ol>
<li>项目一 有序列表 <code>数字 + . + 空格键</code></li>
<li>项目二</li>
<li>项目三</li>
<li>项目三的子项目一 有序列表 <code>TAB + 数字 + . + 空格键</code></li>
<li>项目三的子项目二</li>
</ol>
<h3 id="任务列表-task-lists"><a class="header-anchor" href="#任务列表-task-lists"></a>任务列表（Task lists）</h3>
<p>Markdown 语法：</p>
<pre><code>- [ ] 任务一 未做任务 `- + 空格 + [ ]`
- [x] 任务二 已做任务 `- + 空格 + [x]`
</code></pre>
<p>效果如下：</p>
<ul class="task-list">
<li class="task-list-item"><input type="checkbox" id="cbx_0" disabled="true"><label for="cbx_0"> 任务一 未做任务 <code>- + 空格 + [ ]</code></label></li>
<li class="task-list-item"><input type="checkbox" id="cbx_1" checked="true" disabled="true"><label for="cbx_1"> 任务二 已做任务 <code>- + 空格 + [x]</code></label></li>
</ul>
<h2 id="图片"><a class="header-anchor" href="#图片"></a>图片</h2>
<p>Markdown 语法：</p>
<pre><code>![GitHub set up](https://klause-blog-pictures.oss-cn-shanghai.aliyuncs.com/2019-05-14-143913.gif)
格式: ![Alt Text](url)
</code></pre>
<p><code>Control + Shift + I</code> 可插入Markdown语法。<br>
如果是 MWeb 的文档库中的文档，还可以用拖放图片、<code>CMD + V</code> 粘贴、<code>CMD + Option + I</code> 导入这三种方式来增加图片。<br>
效果如下：</p>
<p><img src="https://klause-blog-pictures.oss-cn-shanghai.aliyuncs.com/2019-05-14-143913.gif" alt="GitHub set up"></p>
<p>MWeb 引入的特别的语法来设置图片宽度，方法是在图片描述后加 <code>-w + 图片宽度</code> 即可，比如说要设置上面的图片的宽度为 140，语法如下：</p>
<p><img src="https://klause-blog-pictures.oss-cn-shanghai.aliyuncs.com/2019-05-14-143913.gif" alt="GitHub set up-w140"></p>
<h2 id="链接"><a class="header-anchor" href="#链接"></a>链接</h2>
<p>Markdown 语法：</p>
<pre><code>email &lt;example@example.com&gt;
[GitHub](http://github.com)
自动生成连接  &lt;http://www.github.com/&gt;
</code></pre>
<p><code>Control + Shift + L</code> 可插入Markdown语法。<br>
如果是 MWeb 的文档库中的文档，拖放或<code>CMD + Option + I</code> 导入非图片时，会生成连接。<br>
效果如下：</p>
<p>Email 连接： <a href="mailto:example@example.com" target="_blank" rel="noopener">example@example.com</a><br>
<a href="http://github.com" target="_blank" rel="noopener">连接标题Github网站</a><br>
自动生成连接像： <a href="http://www.github.com/" target="_blank" rel="noopener">http://www.github.com/</a> 这样</p>
<h2 id="区块引用"><a class="header-anchor" href="#区块引用"></a>区块引用</h2>
<p>Markdown 语法：</p>
<pre><code>某某说:
&gt; 第一行引用
&gt; 第二行费用文字
</code></pre>
<p><code>CMD + Shift + B</code> 可插入Markdown语法。<br>
效果如下：</p>
<p>某某说:</p>
<blockquote>
<p>第一行引用<br>
第二行费用文字</p>
</blockquote>
<h2 id="行内代码"><a class="header-anchor" href="#行内代码"></a>行内代码</h2>
<p>Markdown 语法：</p>
<pre><code>像这样即可：`&lt;addr&gt;` `code`
</code></pre>
<p><code>CMD + K</code> 可插入Markdown语法。<br>
效果如下：</p>
<p>像这样即可：<code>&lt;addr&gt;</code> <code>code</code></p>
<h2 id="多行或者一段代码"><a class="header-anchor" href="#多行或者一段代码"></a>多行或者一段代码</h2>
<p>Markdown 语法：</p>
<pre><code>```js
function fancyAlert(arg) {
    if(arg) {
    $.facebox({div:'#foo'})
    }

}
```
</code></pre>
<p><code>CMD + Shift + K</code> 可插入Markdown语法。<br>
效果如下：</p>
<pre><code class="language-js">function fancyAlert(arg) {
    if(arg) {
    $.facebox({div:'#foo'})
    }

}
</code></pre>
<h2 id="顺序图或流程图"><a class="header-anchor" href="#顺序图或流程图"></a>顺序图或流程图</h2>
<p>Markdown 语法：</p>
<pre><code>```sequence
张三-&gt;李四: 嘿，小四儿, 写博客了没?
Note right of 李四: 李四愣了一下，说：
李四--&gt;张三: 忙得吐血，哪有时间写。
```

```flow
st=&gt;start: 开始
e=&gt;end: 结束
op=&gt;operation: 我的操作
cond=&gt;condition: 确认？

st-&gt;op-&gt;cond
cond(yes)-&gt;e
cond(no)-&gt;op
```
</code></pre>
<p>效果如下（ <code>Preferences</code> - <code>Themes</code> - <code>Enable sequence &amp; flow chart</code> 才会看到效果 ）：</p>
<pre><code class="language-sequence">张三-&gt;李四: 嘿，小四儿, 写博客了没?
Note right of 李四: 李四愣了一下，说：
李四--&gt;张三: 忙得吐血，哪有时间写。
</code></pre>
<pre><code class="language-flow">st=&gt;start: 开始
e=&gt;end: 结束
op=&gt;operation: 我的操作
cond=&gt;condition: 确认？

st-&gt;op-&gt;cond
cond(yes)-&gt;e
cond(no)-&gt;op
</code></pre>
<p>更多请参考：<a href="http://bramp.github.io/js-sequence-diagrams/" target="_blank" rel="noopener">http://bramp.github.io/js-sequence-diagrams/</a>, <a href="http://adrai.github.io/flowchart.js/" target="_blank" rel="noopener">http://adrai.github.io/flowchart.js/</a></p>
<h2 id="表格"><a class="header-anchor" href="#表格"></a>表格</h2>
<p>Markdown 语法：</p>
<pre><code>第一格表头 | 第二格表头
--------- | -------------
内容单元格 第一列第一格 | 内容单元格第二列第一格
内容单元格 第一列第二格 多加文字 | 内容单元格第二列第二格
</code></pre>
<p>效果如下：</p>
<table>
<thead>
<tr>
<th>第一格表头</th>
<th>第二格表头</th>
</tr>
</thead>
<tbody>
<tr>
<td>内容单元格 第一列第一格</td>
<td>内容单元格第二列第一格</td>
</tr>
<tr>
<td>内容单元格 第一列第二格 多加文字</td>
<td>内容单元格第二列第二格</td>
</tr>
</tbody>
</table>
<h2 id="删除线"><a class="header-anchor" href="#删除线"></a>删除线</h2>
<p>Markdown 语法：</p>
<p>加删除线像这样用： <s>删除这些</s></p>
<p>效果如下：</p>
<p>加删除线像这样用： <s>删除这些</s></p>
<h2 id="分隔线"><a class="header-anchor" href="#分隔线"></a>分隔线</h2>
<p>以下三种方式都可以生成分隔线：</p>
<hr>
<hr>
<hr>
<p>效果如下：</p>
<hr>
<hr>
<hr>
<h2 id="mathjax"><a class="header-anchor" href="#mathjax"></a>MathJax</h2>
<p>Markdown 语法：</p>
<pre><code>块级公式：
$$	x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} $$

\\[ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} =
1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}}
{1+\frac{e^{-8\pi}} {1+\ldots} } } } \\]

行内公式： $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$
</code></pre>
<p>效果如下（<code>Preferences</code> - <code>Themes</code> - <code>Enable MathJax</code> 才会看到效果）：</p>
<p>块级公式：<br>
$$	x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} $$</p>
<p>\[ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} =<br>
1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}}<br>
{1+\frac{e^{-8\pi}} {1+\ldots} } } } \]</p>
<p>行内公式： $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$</p>
<h2 id="脚注-footnote"><a class="header-anchor" href="#脚注-footnote"></a>脚注（Footnote）</h2>
<p>Markdown 语法：</p>
<pre><code>这是一个脚注：[^sample_footnote]
</code></pre>
<p>效果如下：</p>
<p>这是一个脚注：<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
<h2 id="注释和阅读更多"><a class="header-anchor" href="#注释和阅读更多"></a>注释和阅读更多</h2>
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<!-- more -->
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<strong>注</strong> 阅读更多的功能只用在生成网站或博客时，插入时注意要后空一行。</p>
<h2 id="toc"><a class="header-anchor" href="#toc"></a>TOC</h2>
<p>Markdown 语法：</p>
<pre><code>[TOC]
</code></pre>
<p>效果如下：</p>
<p>[TOC]</p>
<hr class="footnotes-sep">
<section class="footnotes">
<ol class="footnotes-list">
<li id="fn1" class="footnote-item"><p>这里是脚注信息 <a href="#fnref1" class="footnote-backref">↩︎</a></p>
</li>
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